/** * Copy of rcube_imap::search_index() */ protected function search_index() { $criteria = $this->search; $charset = $this->charset; $imap = $this->worker->get_imap(); if (!$imap->connected()) { trigger_error("No IMAP connection for {$this->folder}", E_USER_WARNING); if ($this->threading) { return new rcube_result_thread($this->folder); } else { return new rcube_result_index($this->folder); } } if ($this->worker->options['skip_deleted'] && !preg_match('/UNDELETED/', $criteria)) { $criteria = 'UNDELETED ' . $criteria; } // unset CHARSET if criteria string is ASCII, this way // SEARCH won't be re-sent after "unsupported charset" response if ($charset && $charset != 'US-ASCII' && is_ascii($criteria)) { $charset = 'US-ASCII'; } if ($this->threading) { $threads = $imap->thread($this->folder, $this->threading, $criteria, true, $charset); // Error, try with US-ASCII (RFC5256: SORT/THREAD must support US-ASCII and UTF-8, // but I've seen that Courier doesn't support UTF-8) if ($threads->is_error() && $charset && $charset != 'US-ASCII') { $threads = $imap->thread($this->folder, $this->threading, rcube_imap::convert_criteria($criteria, $charset), true, 'US-ASCII'); } return $threads; } if ($this->sort_field) { $messages = $imap->sort($this->folder, $this->sort_field, $criteria, true, $charset); // Error, try with US-ASCII (RFC5256: SORT/THREAD must support US-ASCII and UTF-8, // but I've seen Courier with disabled UTF-8 support) if ($messages->is_error() && $charset && $charset != 'US-ASCII') { $messages = $imap->sort($this->folder, $this->sort_field, rcube_imap::convert_criteria($criteria, $charset), true, 'US-ASCII'); } } if (!$messages || $messages->is_error()) { $messages = $imap->search($this->folder, ($charset && $charset != 'US-ASCII' ? "CHARSET {$charset} " : '') . $criteria, true); // Error, try with US-ASCII (some servers may support only US-ASCII) if ($messages->is_error() && $charset && $charset != 'US-ASCII') { $messages = $imap->search($this->folder, rcube_imap::convert_criteria($criteria, $charset), true); } } return $messages; }